and kids from around america and haiti, too, do what they can to help the people of japan. captioning sponsored by cbs from cbs news world headquarters in new york, this is the "cbs evening news" with katie couric. >> smith: good evening, katie is on assignment. president obama delivered a warning today to libyan dictator moammar qaddafi: stop slaughtering your people or face military action. the united states will help enforce a no-fly zone approved last night by the u.n. security council, but no american ground troops will be sent to libya. french and british warplanes could be in the air over libya by tomorrow. hours after the u.n. resolution passed, the qaddafi regime declared a cease-fire, but his forces reportedly kept shelling two cities-- misurata and ajdabiya. and there are also reports that qaddafi's forces are headed toward benghazi, the rebels' capital. david martin at the pentagon begins our coverage. david, good evening. >> reporter: good evening, harry. less than 24 hours after the u.n. security council passed that resolution authorizing air strikes against l